yashsingh1/xdaforums huggingface dataset:
[Nexus 7 General] naiku:
I had a weird issue this morning, that the Nexus did not turn on as expected. It had sat since Sunday, and has been cold, but unlikely to have been below freezing in my garage (likely around freezing though). After about 20 minutes of driving, I was able to power the Nexus back on, and it appears to be working fine. Just not sure what caused it to lock up between Sunday and today.
[Nexus 7 General] Antonnio:
hi man, really really nice installation, congrats

i made the same with my tablet (galaxy tab)

but i am using a AV cable from the tab to the equalizer. everything sounds great when the tab is playing the music

TAB --> EQ --> AMPS

the issue appear when i stop or pause the music.. a BZZZZZ noise begin. to stop the noise, i need to play again the music or down all the volume of the tab or unplug the rca cable from the tab... i dont know is a ground is missing or i need a filter between the equalizer and the RCA cable of the tap. or maybe need also a DAC.. do you have some idea of what is happend?
[Nexus 7 General] Izzmeister1978:
Issue with USB hub deection

Hello Kuchar, I am a noob but nit a bad one.....I know a little bit.....I have an issue that maybe you can help me with please. I am running an N7 like u are in ur dash with everything like u except for a Behringer instead of a FiiO. Im using Timurs FI kernel and ROm and love it....the issue is that although I have the N7 on switched ignition power running to the y cable and a powered usb hub on the data end of the y if the ignition is off the N7 stops seeing the USB hub allthough it is in fact always powered. I dont get it....even when the N7 is on ignition power so its charging, if I unplug the power side of the y cable it loses the connection to the usb hub. This s the last piece of teh puzzle I cant figure out yet.....must be some easy fix. The Hub is a 4 port powered hub that I know is constantly powered because its running into a cigarette barrel connection I wired in and the usb 1.0 amp power connector has a light that remains steady lit.....it has power......

I will post pix like u did once its complete. I have an audison bit one controlling everything and am planning on using the same FM tuner u used only Im going to tap into the cars factory winshield antenna. Its all in an 07 Cadillac CTS-V.......ur help would be most appreciated.....Im running TWRP, Titanium Back, ect.....not all the way noob as I work with servers and mostly Linux for a living but this has me a bit stumped....Thank u much:good:
[Nexus 7 General] Kodiack99:
Do you have the usb rom set to fixed install?

I think the nexus uses the power terminals as a switch to turn on data transfer,if its on fixed it doesnt send power out so it doesnt activate unless power is going in and I dont think that hub sends power back to tablet.

---------- Post added at 02:46 AM ---------- Previous post was at 02:31 AM ----------

Sounds like a ground loop issue,does it change in frequency with engine rpm?

If so then it is a ground loop,you can buy an isolator to filter it out.
[Nexus 7 General] Antonnio:
with the engine on or off the noise is the same, dont change the frequency.. i will try with the insolator.
[Nexus 7 General] Izzmeister1978:
Thank u for answering Kodiack. Tried what u metioned about having FI mode enabled. It is automatically checked when the hub and power to the N7 are present. I tried rebooting an unchecking FI mode, that leaves the hub connected so poweramp doesnt need to rescan or N7 rebooted to show the flash drive with all the music. But when i do that the N7 wont charge? What i really want and think this is how its supposed to work is for the N7 to constantly see the powered usb hub without needing a reboot. I have alot of music and it takes forever for poweramp to scan it all....thats why I was hoping for Kuchar to chime in....maybe he knows something I dont. The only diff in his woring diagfam is that he has 2 hubs that he made powered. Mine is already powered and I have it running to constant power....thanks
[Nexus 7 General] rhythm_dps:
GPS & WiFi External Antennna

SUPERB JOB..!

:good:

but...how did you manage to wire the antenna for GPS & WiFi...??

plzz help
[Nexus 7 General] Izzmeister1978:
I'm not, Im looking into buying the DVB-T usb and ditching the antenna that comes with it in favor of my car's factory antenna for the factory radio. As for wi-fi, im running a wireless hotspot in the car that I pay monthly for. Hopefully someone can help me with my USB issue, or is it supposed to work that way???? Power off to N7 vi ay cale, powered USB hub stops registering until next reboot?
[Nexus 7 General] Izzmeister1978:
Kuchar, would u pls shine some light on this for me? Do I have to reboot all the time to getpoweramp to readthe usb powered hub and scan my library every time or am i missing something? When u power close ignition does the usb hub still show up on ur n7 lr do u reboot rescan every time.... Any insight is greatly appreciated
[Nexus 7 General] Kuchar09:
I will go out and get this info tomorrow I promise!

Only thing I can think is that maybe an app was running in the background, I know copilot and facebook have both drained my battery before since they weren't killed.

That is how mine is... I believe that is how it is suppose to be!

I took the back panel off and soldered a wire to each contact (4) then added quick disconnects in case I need to remove the back panel from my headliner or remove the tablet. On the tablets side I just wrapped the wire around the spring like clip and put a dab of hot glue on them.
[Nexus 7 General] Kuchar09:
It should stop registering till power is re-applied to the y cable, but then you should be able to play music 5-10 sec after powered. You should not have to restart the tablet. Try disabling all the automatic music search stuff in poweramp and any other programs you are using to mount your flash drive. USBROM has its own mounting software so stickmount is not needed.

I can look at my setting more tomorrow in poweramp if your still having problems.
[Nexus 7 General] Izzmeister1978:
Thank u Kuchar, I will disable the automatic scan in poweramp. The way it sits now if I have poweramp running with the tablet rebooted it plays everything. Once i turn off ignition and restart poweramp it shows all my music but it isn't playable....its like a cache. Even if I manually bave poweramp rescan it doesnt find anything on the flash drives....I then have to reboot and everything is back to normal. How much data do u have on ur flash drive(s) i have about 20 gigs and it takes a good 45 seconds to a minute before it rescans everything. Thanks again
[Nexus 7 General] Kuchar09:
Humm I have 64 GB flash drive with about 8gb of music. Once it scans the first time it doesn't have to do it every time.

I remember having a slight issue setting up Timur's new ROM. The problem was that it mounts as sda or sdb... That night not b right but it was something like that so I got rid of stick mount since it was screwing things up.

Try to restart the tab so the music will play, shut off the car, turn back on to where thew music won't play, disable all your sync stuff in power amp the in the settings theres an option to manually have it scan (this is where it will take some time to scan, you should only have to do this when u add new music) for music (I can look at what the option is tomorrow if you can't figure it out). It should find the music then and should be good to go. Hopefully it sees the music when u restart tho.
[Nexus 7 General] Izzmeister1978:
Will def try tomorrow and let u know...hopefully it works and Ithing it does mount it as sdb? Stickmount is not installed anymore. My voice stuff keeps crashing also, maybe its unrelated but since I installed poweramp anything that uses voice crashes once I launch the voice icon like dolphin browser, google nav voice option, etc....going to reinstall gapps see if it makes a difference.
[Nexus 7 General] Izzmeister1978:
Ok, tried this: rebooted N7 and opened Poweramp. I have it set to auto-scan on opening so it did just that. It took about 45 secs to maybe just past a minute to scan the whole library which is roughly about 10 gigs of music. Once it did I had my music, which I keep in folders named kind of music so its easier for me to find but it really isnt there. It wont play any songs, like its just cached. If I rescan manually it finishes really quickly and doesnt pick up my music. When I look at the settings in Poweramp and try to select where to read the data from it doesnt show the sda, sdb storage....so it sees the hub but maybe not the flash drives? If i then reboot the N7 then it will see everything and rescan and alls good. Just dont think its meant to be that way....I shoould have to reboot the tablet each time I want poweramp to show and play my music. How does it work for u guys? Maybe its my hub? I have a Belkin 4 port powered usb hub that is constantly powered. It does have a removable power only cable and a data cable that has micro usb on one end and usb 2.0 on the other. Maybe im missing something here.....dont know. I also dont know how poweramo is supposed to work, Timur had mentioned that its likely not at the Kernel or ROM level but at the app level....so maybe its a Poweramp issue? I snayone running a diff music player with better results..... any help is appreciated.....frustrates the crap outta me. It would have been nice if the N7 had an SD card port so I can put data in it....none of this usb mounting stuff....that would have likely solved my issue, lol.....Thanks ASUS :good:
[Nexus 7 General] DANOFDANGER:
Does anyone know if it is possible to have a usb otg y cable with power and have it connected to the nexus 7 as the host and a usb hub as the slave, powering the usb hub externally and be able to charge the nexus 7 via the power module on the otg y cable without the need of custom kernels like tumor.

For eg

Where the wire diagram is indicated I thought perhaps if I open circuit the 5v that perhaps that would allow charging to the nexus but I don't know if the hub will work without all four cables connected, I know it doesn't with just the data lines even with the hub using external power. But perhaps it may work with the ground still connected ??.

I am not too sure.
[Nexus 7 General] joeavery2:
Something I've been working on

Thought I'd put this here.

Should work with other tablets too. N10 is in the works for my dash! In the mean time I've used it with my Galaxy Note2 also.

When used with a powered USB hub it will charge the tablet all of the time and trigger it on/off with the ignition. You can use Tasker to start music or whatever also.

[http://xdaforums.com/showthread.php?p=39543101#post39543101

Yes the hub will operate if you are supplying it 5volts from a separate source, so long as the data wires are connected. The item linked above may just resolve the issue for you though.
[Nexus 7 General] shigga:
I just installed my n7 in my car going Bluetooth to a JVC deck that I mounted in my glovebox. I just want to verify, I ordered the USB otg y charge cable that you linked to in the op. I want to use a 64gb flash drive and charge. Will I also need a powered USB hub or is the powered hub for peripherals that need more power such as an hdd ? I also am running paranoid ROM with Timur's kernel. Will I need to switch over to the usbrom in order to use the otg charging when the cable comes in?
[Nexus 7 General] Kuchar09:
Unfortunately it is not possible to host and charge without either Timurs kernel or USBROM. Once you at least have Timurs kernel you could charge the tablet off the hub just like plugging it into your computer of course this means you are running an externally powered hub.
[Nexus 7 General] Hydro8:
I see that timur delete easycap driver from his rom.

Do you know how to add this driver manually ?
[Nexus 7 General] joeavery2:
You should be able to according to the USB OTG specs http://www.usb.org/developers/devclass_docs/batt_charging_1_1.zip An Rid_A (resiter from the id pin (pin 4) to ground should be 124k Ohm).

However I tested it on both n7 and n10 and neither recognized the USB device and would charge at the same time. The galaxy Note2 recognized it at 64K Ohm, allowing for both charge and host mode.

I'm still working on some variations. I'll post back if I find the right combo.
[Nexus 7 General] Kuchar09:
Shows what I know lol. Good luck!!!
[Nexus 7 General] naiku:
I am not certain, but maybe, the common ground is needed. Unfortunately I can't find any information, and it is entirely possible that my soldering skills were not up to par. Anyways, I kept losing connection to anything connected to my hub, but my Nexus remained powered, so I know my power was wired correctly. But for example my flash drive would not show up.

I ended up tearing all the wiring out and redoing it, this time WITH a common ground, and so far have not lost connection to anything. I just wish I could find out why the common ground is needed, or if it was simply down to my not so great soldering of tiny USB wires.
[Nexus 7 General] DANOFDANGER:
Does not work, hub does power but the hub will not interact with the host without all four connectors (v+, v-, d+, d-) . Even trying without v+ or v+ and v- at the same time does nothing, all four appear to be needed in order for communication.

The resistor theory seems to be of interest, seems though we need to find the right value in order to activate it. Perhaps the nexus does not have the right design for this idk. But at this point its not possible from what i have tried.
[Nexus 7 General] Izzmeister1978:
Question for Kuchar, u mentioned using a dvb tuner and antenna for radio...... What isthename of the app? Tried finding sdr touch but couldn't. Im guessing this is so u don't have to stream digital radio correct? Also still having issues with poweramp. Kernel sees hub and all connected drives once power comes in ffom ignition switched source but poweramp wont see flash drives until a reboot is performed. File explorer app sees connected flash drives as well but not poweramp even aftef a rescan. What are your settings? And how about that external mic for Google now? Def miss not being able to use it very well........... Thanks again for all your help.
[Nexus 7 General] IIHomieII:
Reverse Camera

My question is for the OP.

In your backup camera video, are you using Tasker with a trigger from the back up lights?

I know you said in the video you have it set for 20 seconds or so but is the command to start the app for the camera triggered by something or do you just open it??

Perhaps you have it set when you start the vehicle and this triggers the screen to come on and then launch the camera app?

Was trying to figure out the best way to automate this procedure.

Thanks and by the way, that is the nicest Tablet install I have seen. I started with a Galaxy Tab 7 more than a year ago and just upgraded to the Nexus 7 last week.

I have seen many installs and your seems to have the most accessories and yet the cleanest install I have seen so far:good:
[Nexus 7 General] Kuchar09:
I though I remember reading something about a common ground when I was figuring out how to fire everything but I can't seem to find it. This is basically the link that I used to figure out how to wire it up even though it was inside a hub. I just tried my method and hoped I didn't blow anything up lol.

The app is SDR Touch, it was taken off the playstore due to being accused of copyright issues. You can find the app HERE.

I'll get you my setting later today!

For external mic the only option is a Bluetooth mic and follow my instructions in one of the videos I made on how to set it up. I'm looking at ordering THIS. I like that one because of the long standby time of 45 days, auto reconnect and also connect 2 devices.

I was originally using tasker but changed it to a shortcut key in external keyboard helper to launch the app when put into reverse and then launch my launcher when not in reverse. I currently have this disabled due to it not always closing and the backup cam not being the greatest. I just ordered an easycap so I can wire up a normal backup cam. Make sure the easy cap has the STK1160 chip inside!!! This is required!!!

With the easycap and special app for it there is not need to setup special commands to open and close it. I was told that when the cam senses the backup lights that the app automatically launches and closes. I would recommend waiting for this since it is a much better solution.

Here is a thread of dcplaya getting everything together to work correctly with Timurs USBROM.

Thanks for the compliments, I really appreciate it!!
[Nexus 7 General] Kuchar09:
Minimalistic Song Title pics/instructions (sorry this took so long to get for you!!!)

Make a profile

Make a task to split the %MTRACK into 3 variables

In Minimalistic text make 3 local variables and make them %MTRACK1, %MTRACK2 and %MTRACK3 for song, artist and album.

Allow poweramp to send out the track info

Here are my settings in Poweramp

After I put new music on my flash drive I just click on auto-find music folders

Then Auto-find

This is how/where my stuff shows up in ES file explorer on my flash drive.
[Nexus 7 General] hunterx82:
Can you come to FL and install this in my ALtima :)
[Nexus 7 General] boozeLee:
truly amazing work. i've always considered myself to be a tech saavy person, but what you've done puts things into perspective... :good:
[Nexus 7 General] eastside770:
what are you using to pull up your flash drive?
[Nexus 7 General] IIHomieII:
Ok, good advice on the easycam, I am surprised that you don't have the IRadar in your setup or did I miss that amongst all your gadgets?

Was wondering if there are ANY downsides to the USB DAC? occasional hicup in anyway or is it 100% reliable..

Thanks for all your help
[Nexus 7 General] Kuchar09:
That one in the pic was ES file explorer but you can also use File manager which is built into CM roms.

I should be getting my easycap and sun visor speaker phone today, so I will probably start messing with the easycap a little this weekend.

I have honestly never heard of the IRadar so I had to do a little researching and have to say it does look pretty sweet. That is definitely something to keep an eye on! I'm just afraid to give up my current radar since it has saved my but many many times lol.

Ever since I have fixed my static issue by giving my DAC constant power I have not had any problems so I would have to say it is 100% reliable!! I know that others may disagree but I think it has a lot to do with the DAC you get.
[Nexus 7 General] eastside770:
Yeah I know that but what's the app your using to put that folder in es? Like I'm using stickmount and sometimes I have to plug and unplug it to get it to see it... And power amp won't update the library I press rescan nothing happens.. I have to do a full sd scan to update my library.. Bc my external hard drive won't show up in the power amp music selection folder.
[Nexus 7 General] IIHomieII:
Well, let me tell you I have been using the IRadar with my tablet install for about a year now and the original app sucked for pairing and without the help of Tasker/LLama to return it to the pairing screen it would have been useless.

Cobra just put out an update that changes all that and now you can change tracks and use navigation via keyboard or voice from inside the app and the pairing issue is gone. In my ladies car she uses her android phone to run the Iradar app in conjunction with her whistler brand radar detector. You do not have to get rid of your current radar to benefit form this app. She hears the user reported locations, photo enforcement cameras, speed traps etc through her android via the JVC head unit in her car, works like Google maps and lowers your music to tell you of the warning and then raises the music to the previous level afterwards. I do not like my tunes interrupted by the Iradar so with the official Radar I can choose audio through the app or the radar itself. The app can also power off the Iradar after a certain amount of time and can detect low voltage drop via the app and turn off when your volts get low. Again those are nice features but for detecting construction, ice , trains, and the police, all that can be done with your current radar and the app combined. You can even report when you see a problem, construction, ice, police speed trap etc. from the app without the IRadar. Example: You are driving to work, see a speed trap and hit REPORT. (Now when you are coming home later you will get the notification "USER REPORTED LOCATION" and the notification is shared with all users of the free app so you will help yourself and others at the same time.

Blah blah blah, try it and you will love it...

Now, I am hoping anyone here can throw some knowledge about the usb dock shown here:

tigerdirect.com item number A50-7100

(cant post links yet)

It says when you are using it the audio and charging is routed from the wireless connectors on the Nexus to the Dock and from this point audio volume is not controllable from the Nexus, only the amp,receiver etc that it is plugged in to. I am wondering does this mean it has a seperate DAC? Would the sound quality be superior to the static, hiss noises that come form the Nexus 3.5mm jack?

Any help with this would be appreciated. I do not want to lose audio volume control directly from the Nexus but that sounds easier and cheaper than changing kernels and buying a DAC.

Anyone have any info on this ??

Thanks all..
[Nexus 7 General] IIHomieII:
Answer to my own question: YES, one of these will pass audio via USB without kernel changes! the other passes digital audio via the charging dots (or whatever those are called)

Still need to know the quality but the article seems to point to it being excellent quality.

Looks like I got get one of these 2 Docks and break em down..

tigerdirect.com item number A50-7100

or

engadget.com/2012/06/30/gear4-speaker-dock-supports-usb-audio-for-jelly-bean-at-google-i/

(still cant post links) lol
[Nexus 7 General] timmgrimm:
First off. You did an awesome job. I've been researching this for months and after finding fragments of ideas this is finally a build that has all of the pieces in one place plus more. You've answered questions for me so i don't have to figure it out trial and error. (Specifically how to supply ample power to the hubs.) I just ordered my amp and speakers off of amazon and my cart is basically a copy of the rest of your save a few differences. You've really turned this from being a daunting task on my horizon into something I feel like is attainable. (Because of the current stereo options and my love for Android, I was doing this no matter what.)

Now my input/question. Although i realize that a usb dac would provide the best solution as far as sound quality, I've been looking at going 3.5mm>ground loop isolator>rca>Single din eq. Four reasons: 1) it will turn the dual rca into the full 5 channels going into my amp, 2)provide volume control. (My 03 tundra doesn't have steering controls.) 3) it's will preform eq functions 4) the model im looking at has a 3.5 aux input for either my phone or my wifes phone. I was looking at the Cadence CEQ773 because it really seemed to fit the bill but I just stumbled across the Cadence CEQ 777. Although it has three less bands for eq, it has a USB input. So I'm wondering what kind of functionality that can provide. Would this become the DAC? Just wondering what everyone's thoughts are about this peice of equiptment /setup. Which would y'all choose?